UJA1076ATW/3V3WD,1

Specialized Overview

The UJA1076ATW/3V3WD,1 is a high-speed CAN core system basis chip from NXP Semiconductors. It integrates a high-speed CAN transceiver compliant with ISO 11898-2 and ISO 11898-5 standards, an advanced independent watchdog, and two voltage regulators. The main regulator (V1) provides a scalable 3.3 V output with up to 250 mA current capability for microcontroller supply. A separate 5 V regulator (V2) powers the on-board CAN transceiver. The device features a full-duplex 16-bit SPI interface, two local wake-up input ports, and a limp home output port. It operates within a battery voltage range of 4.5 V to 28 V and supports data rates up to 1 Mb/s.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver with dedicated low-dropout voltage regulator for enhanced EMC performance
• Includes an advanced independent watchdog supporting Window and Timeout modes with an on-chip oscillator
• Features a scalable 3.3 V or 5 V voltage regulator delivering up to 250 mA for microcontroller power
• Provides a full-duplex 16-bit Serial Peripheral Interface (SPI) for configuration, control, and diagnosis

Specialized Applications

• Electronic Control Units (ECU) in automotive networks
• Networking applications controlling power and sensor peripherals via high-speed CAN
• Systems requiring safe and controlled microcontroller start-up behavior

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm regulator voltage and watchdog inclusion. Ensure compatibility with the target microcontroller's SPI interface and reset requirements. Confirm package availability and lead times through authorized distributors as stock levels fluctuate.

Specialized Selection Notes

Select this component when a single-package solution for CAN communication and power management is required. The 3.3 V version is suitable for 3.3 V microcontrollers. Consider the external PNP transistor option if higher current distribution or thermal management is needed beyond the internal 250 mA limit.

Specialized Part Context

The UJA1076A series replaces discrete components in ECUs by combining a CAN transceiver, voltage regulators, and a watchdog into one HTSSOP32 package. It is designed for automotive applications, offering enhanced EMC performance and protection against electrostatic discharge and transients according to ISO standards.

Specialized Replacement Considerations

Check for direct pin-compatible replacements within the UJA1076A family, such as variants with different regulator voltages (e.g., /5V0) or without the watchdog suffix. Verify that any substitute maintains the same HTSSOP32 package and electrical characteristics.